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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2021
Extractive Industries [Abstract] |
Property, Plant and Equipment | 13.Property, Plant and Equipment Capitalized Costs The following table reflects the aggregate capitalized costs related to Devon’s oil and gas and non-oil and gas activities.
|  | December 31, 2021 |  |  | December 31, 2020 |
Property and equipment: |  |  |  |  |  |  |  |
Proved |  | $ | 38,051 |  |  | $ | 27,589 |
Unproved and properties under development |  |  | 1,081 |  |  |  | 392 |
Total oil and gas |  |  | 39,132 |  |  |  | 27,981 |
Less accumulated DD&A |  |  | (25,596 | ) |  |  | (23,545 | )
Oil and gas property and equipment, net |  |  | 13,536 |  |  |  | 4,436 |
Other property and equipment |  |  | 2,139 |  |  |  | 1,737 |
Less accumulated DD&A |  |  | (667 | ) |  |  | (780 | )
Other property and equipment, net (1) |  |  | 1,472 |  |  |  | 957 |
Property and equipment, net |  | $ | 15,008 |  |  | $ | 5,393 |
(1) | $111 million and $102 million related to CDM in 2021 and 2020, respectively.
Suspended Exploratory Well Costs The following summarizes the changes in suspended exploratory well costs for the three years ended December 31, 2021.
|  | Year Ended December 31, |
|  | 2021 |  | 2020 |  |  | 2019 |
Beginning balance |  | $ | 18 |  | $ | 82 |  |  | $ | 98 |
Acquired WPX costs |  |  | 34 |  |  | — |  |  |  | — |
Additions pending determination of proved reserves |  |  | 206 |  |  | 148 |  |  |  | 278 |
Charges to exploration expense |  |  | (2 | ) |  | (3 | ) |  |  | — |
Reclassifications to proved properties |  |  | (190 | ) |  | (209 | ) |  |  | (294 | )
Ending balance |  | $ | 66 |  | $ | 18 |  |  | $ | 82 |
Devon had no projects with suspended exploratory well costs capitalized for a period greater than one year since the completion of drilling as of December 31, 2021, 2020 and 2019.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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